The International Barbershop Harmony Society (IBHS) is a non-profit organization dedicated to promoting and preserving the art of barbershop singing. Founded in 1938, it encourages vocal harmony through a cappella music, primarily in four-part harmony. The society has thousands of members worldwide, organized into chapters that host regular rehearsals and performances. The IBHS also organizes competitions, festivals, and educational programs to enhance singing skills and foster community among its members. It supports various initiatives, including youth programs and outreach efforts, to introduce barbershop music to new audiences and ensure its continued growth and appreciation.